Got my td04 water lines locally for £50 all in. If you source all the parts yourself it will probably be a bit cheaper. If anyone is making their own you will need the following... 2x m12x1.25 to an6 adaptors 2x 45 degree an6 fittings. An6 braided hose (length varies on different setups) 2x an6 hose end finishers. The an6 hose diameter is a touch smaller than the water pipes on the thermostat housing, dip the hose end in hot water for a few mins and they slide on without much force.